Improved drill-press



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JOHN M., CULLEN AND ANDREW J. BAIRD, OF PITTSBURG, PENN- l SYLVANTA.

Letters Patent No. 83,366, dated October 27, 1868.

IMPROVED DRILL-PRESS.

The Schedule referred to :Ln these Letters Patent and making part of the same To all whom 'it may concer-n:

Be it known 'that we,'JOHN M. CULLEN and AN- DRE W J'. Buien, ofthe city of Pittsburg, in the county of Allegheny, and State of Pennsylvania, have invented certain new and useful lmprovements in Portable Drill-Presses; and We do hereby declare that the following is a full, clear, and exact description of our invention, reference being had to the accompanying drawings, forming part of this specification, and to the letters of reference marked thereon.

The nature of our invention consists in the means we employ for fastening or attaching the apparatus to any object it may be found necessary to drill; also,

thepeculiar construction and operation of the feed and drill-ratchet, Wherebywe can feed and chill, by a continuousV circular motion of the lever and pawl in one direction, without regard to the position of the press..

To enable others to understand and make our app. atus, we` will proceed to describe its construction and operation by reference to the annexed drawings, wherein-J Figure 1 represents a longitudinal vertical section;

Figure 2, a side View, to exhibit the device for adjusting the article to be drilled and Figure 3, a top view ofthe operating-parts, or ratchet and pawl.

All the drawings are lettered, and similar letters denote corresponding parts in the several views.

XVe construct our @drill-press by first making a cast-iron frame, A, with a pair of legs or supports, B B, in the foot of each of which, C C, is placed a setscrew, S S, for, the pin'pose of adjusting the press to the form of the article to be operated on.

Through the top of this frame, so constructed, passes, in a vertical line, a hollow feed-screw, l), through the centre of which passes, longitudinally, thedrill-spindle E, which is prevented from rotating with the screw by the sliding cross-head F, embracing the two legs aforesaid.

Fastened to the top of this screw is a circular ratchetwheel, G, having a number of square teeth, e e, aroluid the outer edge of its Aupper face H, while attached to the drill-spindle is a cross-head, J, having four or more handles, li K, projecting thereii'oin. y.

Attached .to each ofthese cross-bars-is a long spring, L, one end of which is secured in place to the handle or bar by screws, while the other end, being broader, is intended to pass down and catch between the square teeth of the circular ratchet-wheel e e, and thus rotate the tool continuously, and the feed-screw intermitltentl y, and give motion to the feed-screw, in the cir- 'the stroke ofthe levers K, and regulate the motion of -the feed-screw.

' "This adjustable plate is prevented from revolving with the ratchet-wheel bylneans of a guide-rod, N,

passing from said plate through a portion of the im movable top of the frame.

By this arrangement, the forcing-arms K K may have a continuous circular motion, by which they will turn the drill in the right direction, and feed down on the material tobe drilled.

The method adopted by us for attaching this drillpress to the object to be drilled is illustrated by fig. 2.

By reference thereto, it will be seen that from each of 1 two opposite nsides oi' the upper portion of the drillpress or frame A is suspended a male screw, P, moving on a pivot, R, so as to allow of its being drawn in towards the drill, or extended outward from it, thereby adapting itself-to the size of the object to be drilled.

Oneach of these male screws is placed a female screw, T, furnished, at the bottom, with a hook, V; and to these hooks /is suspended a chain, W, for passing around the article to be drilled, which chain is tightened or loosened by turning the said female screws, and the drill-press thereby secured h'rmly in position.

Having thus briey described our invention,

That we claim is- Not any of the speeiiied parts in severalty,l but the improved tool, consisting of the several parts specified, all combined, constructed, and arranged as described.

JOHN M. OULLEN. ANDREV J. BAIRD. `\Vitncsses y y E..W1LLIAMs, Jr.,

J osIAH W. ELLs. 

